Furnace cycles to often
I have a Comfortmaker RPJ gas unit (around 1984 model) . The unit is cycling every 10-13 mins and it is not that cold out here in Ohio yet ( 30 deg ) . Here is what happens , the stat calls for heat and the draft motor starts to run , the burners light and stay lit for 3-4 mins , just before the burners and draft motor kick off the blower starts to move air through the ducts and shuts off in about 1 minute . The thermostat is a digital unit and I don't think the furnace is putting out enough heat to satisfy the stat causing the frequent cycling . Could it be the limit switch needing adjustment ? . Thank you for any responses .